//变量的大小写敏感性 变量区分大小写 Case Sensitivity In Variables
//Declartions
var StuLyCap;
var LiuSix;
var liSeven;
//ASsignments 分配
STULYCAP = 10;
LIUSIX = 12;
LISEVEN = 13;

// console.log(liSeven); undefined